A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study found the variance to be 2.25. He thinks the mean is 7.2 toys per year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.12 at the 95% level of confidence

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Students at a high school were asked about their favorite outdoor activity. the results are shown in the two-way frequency table below. fishing camping canoeing skiing total boys 36 44 13 25 118 girls 34 37 22 20 113 total 70 81 35 45 231 select all the statements that are true based on the given table. more girls chose camping as their favorite outdoor activity than boys. more girls chose canoeing as their favorite outdoor activity than those who chose skiing. more boys chose skiing as their favorite outdoor activity than girls. there were more boys surveyed than girls. twice as many students chose canoeing as their favorite outdoor activity than those who chose fishing. more students chose camping as their favorite outdoor activity than the combined number of students who chose canoeing or skiing.